State-of-the-art and Top-of-the-line

State-of-the-art adjective - Being or employing the latest concepts, styles, or techniques.

Top-of-the-line and state-of-the-art are semantically related In some cases you can use "Top-of-the-line" instead an adjective phrase "State-of-the-art".

Top-of-the-line adjective - Of the very best kind.

State-of-the-art and top-of-the-line are semantically related in prime topic. Sometimes you can use "State-of-the-art" instead an adjective phrase "Top-of-the-line", if it concerns topics such as best.